Pile wire for looms



1 1,645,255 0a. 11, 1927. L PFEIFFER FILE WIRE FOR LOOMS Filed June 24, 1924 I 7 1'0 c 1 LL01 I @[wunamzmi 67':

Patented Oct. 11, 1927.

UNITED STATES PATENT OFFICE.

IMMANUEL PFEIFFER, OF BEDFORD, MASSACHUSETTS, ASSIGNOR, BY DIRECT 'AND MESNE ASSIGNMENTS, TO BLUE TIP FILE YVIRE is KNIFE COMPANY, OF BEDFORD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PILn WIRE Foru LOOIVIS.

Application filed June 24, 1924. Serial No. 722,121.

This invention relates to an improvement in pile wires for looms, the latter being of a type employed for weaving pile fabrics.

The object of the invention is to provide a pile wire for looms of the character mentioned, said wire being provided with a holder in which a knife blade may be cletachably secured and held in a firm and effectivemamier, said holder and blade each being constructed in a manner to permit of saidblade being easily and quickly inserted in, or removed from said holder.

The invention will be best understood by reference to the following -descriptin, when taken in connection with the accompanying drawings of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims.

Referring to the drawings:

Figure 1 is a side elevation of an end portion of a pile wire embodying my invention.

Fig. 2 is a plan of the same.

Fig. 3 is a side elevation of an end portion of the pile wire similar to Fig. 1, the knife blade being removed from the blade holder.

Fig. 4 is a side elevation similar to Fig. 3 illustrating the position of the knife blade when the latter is being applied to the holder.

Fig. 5 is a transverse section taken on the line 55 of Fig. 1.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 6-is a pile wire embodying therein a slender steel rod 7 of suitable length, to one end of which is secured in any suitable manner a holder 8 for a knife blade 9. The holder 8 is preferably constructed of sheet material which is bent U-shaped in.

cross-section to provide side walls 10 and 11 between. which is a narrow groove 12 in which the knife blade 9 is seated. The forward portion of the wall 10 of the holder 8 is extended at 13 to form a guard, and projecting laterally and downwardly from a point adjacent to the upper edge of said holder is a lip 14 which constitutes a pivot for a knife blade 9, said lip projecting through a hole 15 formed in said blade and thereby overhang a portion of said blade. The holder 8 also has a locking member 16 preferably formed as a tongue integral therewith, said locking member projecting laterforcing the bent end portion 17 of said locki'ng member outwardly when the knife blade 9 is being inserted in said holder 8, or is being removed therefrom. The knife blade 9 may be of any suitable shape but is preferably pointed at one end, and blunt at the other end, as illustrated, and the holes 15 and 18 in the present example are located adjacent to the blunt end thereof. 7

In applying the knife blade 9 to the holder 8, said blade is first. positioned approximately as illustrated in Fig. 4, the lip or pivot 14 being inserted through the hole 15 in said blade. The locking member 16 is then sprung outwardly by the tool 21 which is inserted in the space 20 provided therefor, and the blade 9 is then rocked from the position illustrated in 4 to that illustrated in Fig. 1, at which time the lower edge of said blade will rest in the bottom of the groove 12, and when resting in said position, the locking member 16 is allowed to spring into the hole 18 in said blade. When the blade 9 is positioned as illustrated in Fig. 1, said blade is firmly and effectively held within the holder 8, the walls 10 and 11 of which prevent any lateral movement of said blade within said holder while the locking member 18 prevents longitudinal movement in either direction, as well as upward movement, and it will, therefore, be seen that said blade is positively held within said holder. Even if the blade does not snugly fit the space between the walls, yet the tongue 16 resists movement of the blade from the adjacent wall and thus accurately positions the blade. This results in accurate cutting of the loops and in uniform appearance of the work.

I claim:

1. A pile wire knife comprising, in combination, a blade, and a blade holder having mally engaging and retaining said blade against swinging movement.

12. A pile wire knife comprising, in combination, a blade, and a blade holder having two walls presenting between them a groove which receives a longitudinal edge of said blade, said holder presenting a fulcrum which overhangs a portion of said blade and onwhich said blade swings in attaching it to and detaching it from said holder, said fulcrum preventing rearward displacement of said blade, one of said walls extending longitudinally beyond the other and pre senting a forwardly directed guard and presenting a rearwardly directed tongue resiliently related to such wall and normally engaging said blade with yielding pressure.

3. A pile Wire for looms having a blade holder located at one end thereof provided with a groove formed therein and with a pivot comprising a laterally and downwardly projecting lip formed integral therewith, a knife blade detachably mounted upon said pivot, and means upon said holder projecting throughsaid blade and positively holding said blade in said holder.

4. A pile wire for looms having a blade holder located at one end thereof provided with a groove formed therein and with a pivot formed thereon, a lrnife blade detachably mounted upon said pivot and seated in said groove, said blade being provided with a pair of holes therein, said pivot projecting through one of said holes, and a resilient locking memberformed integral with said holder and extending laterally therefrom, said member projecting through the other of said holes, said member positively holding said blade in said holder, a space being provided between said locking member and said holder to receive a tool for operating said locking member. r

5. A pile wire knife comprising, in combination, a blade, and a blade holder having two walls presenting between them a groove which receives a longitudinal edge of said blade, said holder presenting a fulcrum engaged by said blade andon which said blade swings in attaching it to and detaching it from said holder, said holder presenting a spring tongue supported by and resiliently related to one of said walls and normally retaining said blade against swinging movement and resisting movement of said blade from such wall. y

In testimony whereof I have hereunto set my hand.

IM'MAN'UEL PFEIFFER. 

